The state’s Division of Motor Vehicles has 12 vanity plate reject codes—special symbols like exclamation points and dollar signs, for instance, aren’t allowed. But the most common cause for denial, by a Pikes Peak–size margin, is number six: “Possibly offensive to the general public.” So as you plot your family’s summer road trip, be thankful the kids won’t be asking you to explain the meanings of these 10 plates, all deemed inappropriate by the DMV.

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